Primary Charging Roller Cleaning Mechanism - Canon imageRUNNER 330 Service Manual

G. Primary Charging Roller Cleaning Mechanism
1. Outline
The machine is equipped with a mechanism which automatically cleans the primary charging
roller.
The primary charging roller is cleaned by turning on the primary charging roller cleaning
solenoid (SL4), thereby butting the cleaning pad against the primary charging roller and, at the
same time, moving it across the length of the roller.
Cleaning is performed for the following:
• When making 50 or more copies in continuous mode, during last rotation at the end of the
copying operation.
• When making less than 50 copies, during last rotation when the cumulative number of
copies has reached 500.
• When roller cleaning is executed under "adjust/clean" in user mode. (In this case, cleaning
is performed while applying a cleaning bias to the transfer charging roller.)
Back-and-forth
movement
COPYRIGHT © 1999 CANON INC. CANON imageRUNNER 400/330 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 6 IMAGE FORMATION SYSTEM
SL4 (ON)
Cleaning pad
Figure 6-109
Primary
charging roller
Photosensitive drum
6-15